There were a couple of scenes that were set up very well.
1. When Okazaki tries to shoot a hoop for Nagisa near the beginning. I didn't see that coming.
2. When Nagisa watches a video of her father's acting and his winning words. If I had watched that scene without previous context, I would've felt that scene to be a happy and proud one. However, that was a very sad scene for me to swallow.

Saddest episode? Can't seem to make up my mind... So let me list down my top seven(not in order of importance)

One - The episode when Fuko vanished from their sight, that was some teary eyed view I had and for an instance, they have forgotten about her!! Many people also didn't seem to notice her anymore including Nagisa's parents.

Two - Kotomi in turmoil and despair. It seems so unnoticed because of her happy nature so that really surprise me a bit. But looking at how Okazaki worked hard and the others too to prepare that garden and make her came back seem so dramatic.

Three - When the Theatre Club faced Opposition and about to be dissolved and when they see some hope, other things came up including Nagisa fainting.

Four - The Episode where Nagisa made a comeback and in front of all the other girls accompany her to the clinic after being hit by a ball. The twins cried and so the others with silent sobs.

Five - The episode where Nagisa first fainted and Okazaki bring her home. It was an encounter under the rain with the basket ball as the only witness to the grief stricken revelation.

Six - The episode where Nagisa discovered the album and in a flash balmed herself for all that happened. It was a heart sobbing event and it's the day before her performance!!!

Seven - When Okazaki left home and moved to Nagisa's house. Nagisa at that time was listening to what the teacher is telling okazaki's father who didn't seem to care about him.

1st :When they forgot about fuko.. ( the part when she was there all along, i mean the part when she reappeared and they both realized that Fuko was there all along)
2nd:During the tennis game, when nagisa was hit and the twins cried (wait? are Ryou & Kyou twins?) ahahah..
It's just sad because it was somehow related to my experience..